text: // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // copy of this software and associated documentation files (the
  // "Software"), to deal in the Software without restriction, including
  // without limitation the rights to use, copy, modify, merge, publish,
  // distribute, sublicense, and/or sell copies of the Software, and to permit
  // persons to whom the Software is furnished to do so, subject to the
  // following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  'use strict';
  const common = require('../common');
  if (!common.hasCrypto)
    common.skip('missing crypto');
  
  const assert = require('assert');
  const tls = require('tls');
  const fixtures = require('../common/fixtures');
  
  function loadPEM(n) {
    return fixtures.readKey(`${n}.pem`);
  }
  
  const serverOptions = {
    key: loadPEM('agent2-key'),
    cert: loadPEM('agent2-cert'),
    requestCert: true,
    rejectUnauthorized: false,
    SNICallback: function(servername, callback) {
      const context = SNIContexts[servername];
  
      // Just to test asynchronous callback
      setTimeout(function() {
        if (context) {
          if (context.emptyRegression)
            callback(null, {});
          else
            callback(null, tls.createSecureContext(context));
        } else {
          callback(null, null);
        }
      }, 100);
    }
  };
  
  const SNIContexts = {
    'a.example.com': {
      key: loadPEM('agent1-key'),
      cert: loadPEM('agent1-cert'),
      ca: [ loadPEM('ca2-cert') ]
    },
    'b.example.com': {
      key: loadPEM('agent3-key'),
      cert: loadPEM('agent3-cert')
    },
    'c.another.com': {
      emptyRegression: true
    }
  };
  
  const clientsOptions = [{
    port: undefined,
    key: loadPEM('agent1-key'),
    cert: loadPEM('agent1-cert'),
    ca: [loadPEM('ca1-cert')],
    servername: 'a.example.com',
    rejectUnauthorized: false
  }, {
    port: undefined,
    key: loadPEM('agent4-key'),
    cert: loadPEM('agent4-cert'),
    ca: [loadPEM('ca1-cert')],
    servername: 'a.example.com',
    rejectUnauthorized: false
  }, {
    port: undefined,
    key: loadPEM('agent2-key'),
    cert: loadPEM('agent2-cert'),
    ca: [loadPEM('ca2-cert')],
    servername: 'b.example.com',
    rejectUnauthorized: false
  }, {
    port: undefined,
    key: loadPEM('agent3-key'),
    cert: loadPEM('agent3-cert'),
    ca: [loadPEM('ca1-cert')],
    servername: 'c.wrong.com',
    rejectUnauthorized: false
  }, {
    port: undefined,
    key: loadPEM('agent3-key'),
    cert: loadPEM('agent3-cert'),
    ca: [loadPEM('ca1-cert')],
    servername: 'c.another.com',
    rejectUnauthorized: false
  }];
  
  const serverResults = [];
  const clientResults = [];
  const serverErrors = [];
  const clientErrors = [];
  let serverError;
  let clientError;
  
  const server = tls.createServer(serverOptions, function(c) {
    serverResults.push({ sni: c.servername, authorized: c.authorized });
    c.end();
  });
  
  server.on('tlsClientError', function(err) {
    serverResults.push(null);
    serverError = err.message;
  });
  
  server.listen(0, startTest);
  
  function startTest() {
    function connectClient(i, callback) {
      const options = clientsOptions[i];
      clientError = null;
      serverError = null;
  
      options.port = server.address().port;
      const client = tls.connect(options, function() {
        clientResults.push(
          client.authorizationError &&
           (client.authorizationError === 'ERR_TLS_CERT_ALTNAME_INVALID'));
  
        next();
      });
  
      client.on('error', function(err) {
        clientResults.push(false);
        clientError = err.message;
        next();
      });
  
      function next() {
        clientErrors.push(clientError);
        serverErrors.push(serverError);
  
        if (i === clientsOptions.length - 1)
          callback();
        else
          connectClient(i + 1, callback);
      }
    }
  
    connectClient(0, function() {
      server.close();
    });
  }
  
  process.on('exit', function() {
    assert.deepStrictEqual(serverResults, [
      { sni: 'a.example.com', authorized: false },
      { sni: 'a.example.com', authorized: true },
      { sni: 'b.example.com', authorized: false },
      { sni: 'c.wrong.com', authorized: false },
      null
    ]);
    assert.deepStrictEqual(clientResults, [true, true, true, false, false]);
    assert.deepStrictEqual(clientErrors, [
      null, null, null, null,
      'Client network socket disconnected before secure TLS ' +
      'connection was established'
    ]);
    assert.deepStrictEqual(serverErrors, [
      null, null, null, null, 'Invalid SNI context'
    ]);
  });
  